There are languages out there that are more or less designed for rapid prototyping of PLs. Lisps, and in particular, Schemes such as Gerbil and Racket, are part

There are languages out there that are more or less designed for rapid prototyping of PLs. Lisps, and in particular, Schemes such as Gerbil and Racket, are particularly well-suited to building languages. Yes, you have to get used to the prefix notation and (((((((, but ultimately it lets you have a lot of flexibility in testing out language constructs and usage-patterns before you build the parser, lexer, etc. that are time consuming.